Bsi bs au 192 1983 (2000) iso 7237 1981

BRITISH STANDARD AUTOMOBILE SERIES BS AU 192 1983 ISO 7237 1981 Glossary of terms for Masses and dimensions of caravans [ISO title Road vehicles — Masses and dimensions of caravans — Terms and definit[.]

ISO 7237:1981

[ISO title: Road vehicles— Mas es and dim ensions ofcaravans—

Term s and definitions]

U C [ 62 1 – 4 0 1+7 8.7 ]0 1.4

This Bri shStan ard, ha ing

b en pre ared u der the

directonof the Automo ile

Stan ards Commi e ,was

published u der the authoriy

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3 Octo er 1 8

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The folowing BSI references

relate to the work on this

stan ard:

Commi e reference AUE/

-Draft for comment8 /79 7 DC

ISBN 0 5 0 1 4 3 0

This BritishStand rd was publ shed u der the direction of the Automobi e

Stand rds Commit e AUE/-, upon which the folowing bodies were

represented:

Amalg amated Union of Eng ine ring W orker

Auto-cy cle Union

Automobi e Association

British Rub er Man facturer ’ Association

British Ste l Ind ustry

Dep rtment of Industry ( Mechanical Eng ine ring )

Dep rtment of the Env ironment ( Transport an Roa Resear h La oratory )

Dep rtment of Transport ( Hig hway s)

Freig ht Transport Association Limited

Institute of Pur hasing and S p ly

Institution of Mechanical Eng ine r

Institution of Production Eng ine r

Lond on Transport Executiv e

Ministry of Defence

Motor Cy cle Association of Great Britain

National Carav an Cou ci Limited

National Freig ht Corporation ( NFC) Ltd

Roa Haulag e Association Ltd

Roy al Automobie Club

Society of Motor Man facturer and Tra er Limited

Am endm ents is ued sinc publ cation

Amd No Date of is ue Comments

Pag e

National foreword

This BritishStand ard, which has be n prep red under the direction of the

Automobi e Stand rds Commit e , is identical with ISO723 :19 1 “ R oa d

vehicle — Ma ss s a nd d imensions o ca r a va ns— Ter ms a nd d efiniions”

prep red b Tech ical Commit e ISO/ TC2 , Roa v ehicles, an publ shed b

the International Org anization for Stand rdization ( ISO)

Term inolog y and conventions The text of the International Stand rd has

be n a prov ed as suita le for publcation as a BritishStand rd without

d ev iation Some terminolog y and certain conv entions are not identical with those

used in BritishStand rds; at ention is d rawn especialy to the fol owing

The comma has be n used as a decimal marker In BritishStand ards it is cur ent

practice to use a ful point on the b selne as the decimal marker

W herev er the words “ International Stand rd” a pear,refer ing to this stand rd ,

they should be rea as “BritishStand ard ”

Cros - referenc s The references in the text to ISO1 7 are to the rev ised

edition of ISO1 7 , cur ently in cour e of prep ration The 19 4 edition is

refer ed to in clause3

The tech ical commit e has rev iewed the prov isions of ISO61 , ISO1 0 ,

ISO1 7 an ISO3 3 , refer ed to in the tex t, and has decided that they are

ac epta le for use in conju ction with this stand ard

A related BritishStand rd for ISO1 0 is BS AU1 3 “ Spe ifica tion f r

d imensiona l cha r a cter istc o couplng ba ll f r ca r a va ns a nd lght tr a iler s”

A British Stand ard d oes not purport to includ e al the neces ary prov isions of a

contract User of British Stand rd s are responsible for their cor ect a plcation

Com pl anc with a British Standard does not ofitself confer im m unity

f om leg al o l g ations

Sum mary of pag es

This document comprises a f ont cov er, an inside font cov er, p g es iandi ,

p g es1 to6, an inside b ck cov er and a b ck cov er

This stand rd has be n up ated ( se copy rig ht d ate) an ma hav e ha

amendments incorporated This wi l be indicated in the amendment ta le on the

inside f ont cov er

1 Scope

This International Stand ard defines terms relating to mas es and d imensions of carav ans

It do s not deal with method s of measurement, the u its used in reporting the results, the ac uracy

required or the order of mag nitude of the mas es an d imensions d efined

2 Field ofa ppl cation

The prov isions of this International Stand rd a ply to carav ans as defined in ISO3 3

3 Ref r nces

ISO61 , R oa d vehicle — Dimensions o moto vehicle a nd towed vehicle — Ter ms a nd d efiniions

ISO1 0 , R oa d vehicle — Ca r a va ns a nd lght tr a ilor s— Couplng ba ll— Dimensiona l cha r a cter istc

ISO1 7 , R oa d vehicle — Weights— Voca bula r y

ISO3 3 , R oa d vehicle — Type — Ter ms a nd d efiniions

4 General

Unles otherwise stated , the definitions are a pl ca le for a carav an new f om the factory , in the fol owing

conditions:

a) the carav an is stationary and the sup orting sur ace is horiz ntal; leng ths and widths are measured

in the horiz ntal plane, an heig hts in the v ertical plane;

b) al whe ls of the carav an, includ ing the jockey whe l, rest on the sup orting sur ace, an its interior

flo r is horiz ntal;

c) ro f v ents, do r , and wind ows are closed ; retracta le steps are retracted;

d ) the long itudinal median plane of the carav an is that defined in ISO61 , clause5;

e) the mas ofthe carav an, at the moment of measurement, is the ma imum authoriz d total mas

( se 5.1.4.2), the loa being distributed ac ording to the manufacturer’s instructions;

f) the ty res are inflated to the pres ure cor esponding to the ma imum authoriz d total mas

( se 5.1.4.2) of the carav an

5 Mas es

5.1 Mas es relative to the carav n alone

5.1.1 unladen mas The mas of the carav an ful y eq uip ed for serv ice in

ac ord nce with man facturer’s specification, but

excluding optional extras

5.1.2 del vered mas The mas of the carav an including al eq uipment and

optional extras as del v ered to the fir t retai buy er

5.1.3 actual mas The mas of the carav an as loa ed for a p rticular

journey

5.1.4 maximum total mas

5.1.4.1 ma ximum ma nufa ctur er ’s tota l

ma ss

The mas calculated b the man facturer for specific

operating cond itions, taking into ac ou t such elements

as streng th of materials, ty re loa ing ca acity , etc

5.1.4.2 ma ximum a uthor ized tota l ma ss The mas calculated b the a ministrativ e authority for

operating conditions laid down b the authority

N T Contrary to the fo tnote to term 4.7.2 in ISO1 7 ,this mas

inclu es the statc lo d div ided b g

a

on the coupling b l

5.1.4.3 ma ximum us r ’s tota l ma ss The mas equal to the ma imum authoriz d total

mas (5.1.4.2) or the authoriz d towed mas ( se 5.2.3.2),

whichev er has the smaler v alue

a

g is the stan ard ac eleraton d e to g rav ity

5.2 Mas es relative to the com bination of m otor vehicle and cara an

5.1.5.1 ma nufa ctur er ’s ma ximum pa yloa d

Product of g

a

an the diference betwe n the ma imum

man facturer’s total mas (5.1.4.1) and the u la en

mas ( 5.1.1)

5.1.5.2 ma ximum a uthor ized pa yloa d

Product of g

a

an the diference betwe n the ma imum

authoriz d total mas ( 5.1.4.2) and the u lad en

mas ( 5.1.1)

5.1.5.3 us r ’s ma ximum pa yloa d

Product of g

a

an the diference betwe n the ma imum

user’s total mas (5.1.4.3) an the delv ered mas ( 5.1.2)

5.1.6 load on t he left whe l (on the

right whe l

The load transmit ed to the sup orting sur ace b the

whe l( s) located on the left side ( rig ht side) of the

carav an

5.1.7 maximum autho ized load on

t he axle

The diference betwe n the prod uct of the ma imum

authoriz d total mas ( 5.1.4.2) an g

a

and the static loa

at the couplng b l ( se 5.1.8)

5.1.8 st atic load at the coupl ng bal The v ertical static load a pled at the centre of the

coupl ng b l cup in the coupl ng head of the carav an

This centre is coincid ent with the centre of the couplng

b l on the towing motor v ehicle

5.1.9 max imum permis ible st at ic

load at the coupl ng head, f r

t he caravan

The ma imum static load , laid d own b the man facturer

of the carav an, and , in cou tries wher e it is neces ary ,

authoriz d b the ad ministrativ e authority , that is

permis ible for the carav an

NOT For the ma imum statc lo d on the coupling al for the towing

motor v ehicle, se 5.2.4

a

g is the stan ard aceleraton d e to g ra iy

5.2.1 actual combined mas The sum of the actual mas of the carav an( 5.1.3) an its

towing motor v ehicle

5.2.2 maximum autho ized actual

combined mas , f r a mot or

vehicle

The sum of the ma imum authoriz d mas of the motor

v ehicle ( se ISO1 7 ) an the mas obtained b d iv iding

the ma imum authoriz d load on the a le(5.1.7) b g

a

u les the ad ministrativ e authority fixes a lower lmit

5.2.3 t owed mas (b a moto vehicle) Se ISO1 7

5.2.3.1 ma nufa ctur er ’s towed ma ss Se ISO1 7

5.2.3.2 a uthor ized towed ma ss Se ISO1 7

5.2.4 maximum permis ible static

load on t he coupl ng bal , f r

t he t owing moto vehicle

The ma imum static loa ( 5.1.8), on the coupl ng b l of

the motor v ehicle, declared b the man facturer of that

v ehicle, and which the motor v ehicle is d esig ned to

sup ort

a

g is the stan ard aceleraton d e to g ra iy

6 Dimensions

6.1 Long itudinal dim ensions

6.1.1 o eral length The distance betwe n the

two v ertical planes

perpendicular to the

long itudinal med ian plane

of the carav an and touching

the f ont and rear ofthe

carav an respectiv ely

N T All p rts of the cara an,

inclu ing ny p rts projectng fom

the re r, are contained wihin

these two planes

6.1.2 b dy length The distance betwe n two

v ertical planes,

perpendicular to the

long itudinal med ian plane

of the carav an, and

touching the font an rear

p rts of the body

N T All ac es ories fix d on the

b dy ( for e ample sig naling lig hts,

han les) are contained wihin

these two planes

6.1.3 whe l spac In the case close coupled

a les, or tand em a le, the

d istance betwe n the two

v ertical planes p s ing

throug h the centre l nes of

the whe ls

6.1.4 rear o erhang The distance betwe n the

v ertical plane p s ing

throug h the a is of the

whe ls and the rearmost

point of any p rts rig idly

at ached to the carav an

N T In the case of cara ans

ha ing twin a les, the a is ofthe

re r whe ls shal b taken for this

purp se

6.1.5 drawbar

length

The distance betwe n two

v ertical planes,

perpendicular to the

long itudinal med ian plane

of the carav an, one p s ing

throug h the centre of the

coupl ng b l and the other

p s ing throug h the font

edg e of the bod bearer

situated on the chas is

f ame

6.2 Transver e dimensions

6.1.6 f rward

displac ment

o the c nt re

o gravit y

The distance betwe n the

v ertical plane p s ing

throug h the a is of the

whe ls an the centre of

g rav ity of the carav an

N T In the case of twin a les,

the v rtcal plane e uidistant fom

the two a les shal b taken for this

purp se

6.2.1 o eral width The distance betwe n the

two v ertical planes p ralel

to the long itud inal median

plane of the carav an and

touching the carav an on

both sid es of this plane

6.2.2 t rack The distance betwe n:

a) in the case of two sing le

whe ls cor esponding to

the same real or imag inary

a le, the two straig ht lnes

formed b the a es of the

traces left b the whe ls on

the sup orting sur ace;

b) in the case oftwin

whe ls, the straig ht l nes,

on each sid e of the

carav an, eq uidistant f om

the outer edg e of the trace

of the in er whe l and

f om the in er ed ge of the

trace of the outer whe l

6.2.3 lateral

displac ment

o the c nt re

o gravit y

The distance betwe n the

centre of g rav ity and the

long itudinal median plane

of the carav an

6.3 Vertical dimensions

6.3.1 o eral height The d istance betwe n the

sup orting surace and a

horiz ntal plane touching

the up ermost p rt of the

carav an

NOT Contrary to clause4e),

this dimension shal b me sured

when the mas of the cara an is

the u laden mas ( 5.1.1)

6.3.2 height o

coupl ng

head

The d istance betwe n the

sup orting surace and the

centre of the couplng head

6.3.3 height o

c ntre o

gravit y

The d istance betwe n the

centre of g rav ity an the

sup orting surace,

determined ac ord ing to the

loa ing conditions specified

in 5.1.1

6.3.4 gr und

clearanc

The d istance betwe n the

g round and the lowest point

of the centre p rt of the

v ehicle The centre p rt is

that p rt contained

betwe n two planes p ralel

to an eq uid istant fom the

long itudinal median plane

( of the v ehicle)

[se clause4d )] and

sep rated b a distance

which is 8 % of the least

distance betwe n points on

the in er ed g es of the

whe ls on any one a le

6.3.5 height to

flo r

The d istance f om the

sup orting surace to the

up er sur ace of the flo r

6.4 Ang les

6.4.1 dep rture

angle

The g reatest ang le betwe n

the horiz ntal plane an

planes tang ential to the

static loa ed whe l ty res

( behind the a le), such that

no point of the carav an

behin the a le and no p rt

rig id ly at ached to the

carav an l es below these

planes

N T In the case of twin a les,

the re rmost whe ls shal b taken

for this purp se

6.4.2 ramp angle

f r t he

combination

o moto

vehicle and

caravan

The sup lement of the

smal est d ihedral ang le

ov er which the combination

of motor v ehicle an

carav an can c os without

foul ng the ridg e, the b l

distance fom the g rou d

being in the heig ht rang e

specified in ISO1 0

6.4.3 manoeuv ing

angle f r t he

combination

o moto

vehicle and

caravan

The ang le betwe n the

long itudinal median plane

of the carav an and the

long itudinal median plane

of the motor vehicle when

the motor v ehicle d raws or

pushes the carav an

6.4.4 l mit o

reversing

angle f r t he

combination

o moto

vehicle and

caravan

The ma imum v alue of the

mano uv ring ang le(6.4.3),

in the rev er ing g ear, that

the d riv er ma inc ease or

dec ease

N T W hen the mano uvring

ang le is a o e this v lue,the driv r

is u a le to control the re er ing

mano uvre

6.4.5 angle o

contact o the

combination

o moto

vehicle and

caravan

The ma imum

mano uv ring ang le(6.4.3)

at which the motor vehicle

contacts the carav an

B

ISO 7237:1981

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